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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 36 (Brake Control System (W/ Intelligent Cruise Control) (2 Of 2)) >> DTC/Circuit Diagnosis >> C1121 Abs Out Valve System >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK CONNECTOR 
    1. Turn the ignition switch OFF.
    2. Check the ABS actuator and electric unit (control unit) harness connector for disconnection or looseness.

    Is the inspection result normal?

    YES

    GO TO 3 .

    NO

    Repair / replace harness or connector and securely lock the connector. GO TO 2 .

  2. PERFORM SELF-DIAGNOSIS 
    1. Turn the ignition switch OFF.
      NOTE: Wait at least 10 seconds after turning ignition switch OFF.
    2. Start the engine.
      NOTE: Wait at least 10 seconds after starting the engine.
    3. Select "Self Diagnostic Result" mode of "ABS".

    Is DTC "C1121", "C1123", "C1125" or "C1127" detected?

    YES

    GO TO 3 .

    NO

    Inspection End.

  3. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY AND GROUND CIRCUIT 

    Check the ABS actuator and electric unit (control unit) power supply and ground circuits. Refer to Diagnosis Procedure .

    Is the inspection result normal?

    YES

    GO TO 4 .

    NO

    Repair / replace harness, connector, fuse, or fusible link.

  4. CHECK TERMINAL 

    Check the ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with harness connector.

    Is the inspection result normal?

    YES

    Replace the ABS actuator and electric unit (control unit). Refer to Removal and Installation .

    NO

    Repair / replace harness, connector, or terminal.

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